397580242 has 12 divisors (see below), whose sum is σ = 607843530. Its totient is φ = 195036608.

The previous prime is 397580203. The next prime is 397580269. The reversal of 397580242 is 242085793.

It can be written as a sum of positive squares in 3 ways, for example, as 395174641 + 2405601 = 19879^2 + 1551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 397580195 and 397580204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29767 + ... + 41002.

Almost surely, 2^397580242 is an apocalyptic number.

397580242 is a deficient number, since it is larger than the sum of its proper divisors (210263288).

397580242 is an equidigital number, since it uses as much as digits as its factorization.

397580242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70877 (or 70824 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 397580242 is about 19939.4142842763. The cubic root of 397580242 is about 735.3175495524.

The spelling of 397580242 in words is "three hundred ninety-seven million, five hundred eighty thousand, two hundred forty-two".